Class 8 Surface Tension/ How many drops of water can a penny hold?
State Standards: GLEs/GSEs:
State/GSE's:
PS1 - All living and nonliving things are composed of matter having characteristics [properties] that distinguish one substance from another.
2a. Students demonstrate an understanding of characteristics [properties] of matter by recognizing that different substances have properties, which allow them to be identified regardless of the size of the sample.
2b. classifying and comparing substances using characteristics [properties] (e.g. solid,liquid,gas)
National Standards:
NS.5-8.2 Physical Science
As a result of their activities in grades 5-8, all students should develop an understanding
Properties and changes of properties in matter
Context of Lesson:
Duration: 1 period/50 min
Students will apply what they have learned from prior classes. They will participate in "How many drops of water can a penny hold?". Their data and observations will be shared.
Opportunities to Learn:
Depth of Knowledge:
Level 1,2&3. Students will estimate how many drops of water a penny can hold. Students will then investigate, using an experimental procedure. Results will be recorded on data table.
Prerequisite Knowledge:
Definition of surface tension.
Plans for Differentiating Instruction:
"Hands on" learning. Activity is "bridged" with one prior. Small groups if needed.
Accommodations and modifications:
Scaffolding if needed. Students may take extra time or do the experiment at home. Magnifying glasses will be provided for students with vision impairments.
Environmental factors:
Materials are easily accessible. Calm and quiet classroom to promote accuracy and limit distractions.
Students will predict how many drops of water a penny can hold and then perform a test to see the results.
Instruction:
Opening:
Teacher explains to students that they will be conducting a short experiment to see how many drops of water a penny can hold.
A short demonstration is made to explain that surface tension is caused by the position and attraction of liquid particles. Teacher draws a circle on the board and places circular magnets within the outline of it like liquid particles are arranged. Teacher asks "What do the circles represent? (Particles in a liquid).Teacher draws lines of attractive forces between all the particles then asks "How do the lines of force differ between surface particles and inner particles?(Surface particles have an attractive force on only one side). "What effect does a one-sided pull have on surface particles? (Surface particles pull together and toward inner particles). Teacher reflects this by moving the circles.
Engagement:
Students get their penny, eye dropper, and cup of water and start investigation(3 trials). Recording observations on data table.
Closure:
Teacher asks if any one got the penny to hold 5 drops? 10? 20? Asks students what external factors can affect the results.
Assessment:
Data table handed in and Liquid worksheet for homework.
Lesson Plan
Lesson Title:
Class 8 Surface Tension/ How many drops of water can a penny hold?State Standards: GLEs/GSEs:
State/GSE's:PS1 - All living and nonliving things are composed of matter having characteristics [properties] that distinguish one substance from another.
National Standards:
NS.5-8.2 Physical ScienceAs a result of their activities in grades 5-8, all students should develop an understanding
Context of Lesson:
Duration: 1 period/50 minStudents will apply what they have learned from prior classes. They will participate in "How many drops of water can a penny hold?". Their data and observations will be shared.
Opportunities to Learn:
Depth of Knowledge:
Level 1,2&3. Students will estimate how many drops of water a penny can hold. Students will then investigate, using an experimental procedure. Results will be recorded on data table.Prerequisite Knowledge:
Definition of surface tension.Plans for Differentiating Instruction:
"Hands on" learning. Activity is "bridged" with one prior. Small groups if needed.Accommodations and modifications:
Scaffolding if needed. Students may take extra time or do the experiment at home. Magnifying glasses will be provided for students with vision impairments.Environmental factors:
Materials are easily accessible. Calm and quiet classroom to promote accuracy and limit distractions.Materials:How many drops can a penny hold?
cup of water, eye dropper, penny, data tableObjectives:
Students will predict how many drops of water a penny can hold and then perform a test to see the results.Instruction:
Opening:
Teacher explains to students that they will be conducting a short experiment to see how many drops of water a penny can hold.A short demonstration is made to explain that surface tension is caused by the position and attraction of liquid particles. Teacher draws a circle on the board and places circular magnets within the outline of it like liquid particles are arranged. Teacher asks "What do the circles represent? (Particles in a liquid).Teacher draws lines of attractive forces between all the particles then asks "How do the lines of force differ between surface particles and inner particles?(Surface particles have an attractive force on only one side). "What effect does a one-sided pull have on surface particles? (Surface particles pull together and toward inner particles). Teacher reflects this by moving the circles.
Engagement:
Students get their penny, eye dropper, and cup of water and start investigation(3 trials). Recording observations on data table.Closure:
Teacher asks if any one got the penny to hold 5 drops? 10? 20? Asks students what external factors can affect the results.Assessment:
Data table handed in and Liquid worksheet for homework.Reflections
(only done after lesson is enacted)Student Work Sample 1 – Approaching Proficiency:
Student Work Sample 2 – Proficient:
Student Work Sample 3 – Exceeds Proficiency: